What political idea does this quote express?

Why is the supremacy clause considered to be the root of federalism?

Before a case can be heard in a state high court, it must

3. meena and ala are two friends. meena has a habit of using new pens almostevery day, whereas ala believes in getting a refill for her pen instead of buyinga new pen even though her friends make fun of her.a) which out of two practices would you follow and why? b) which value is ala depicting?